At the North Pole, 24 time zones collide at a single point, rendering them meaningless. At Earth’s other pole, time zones are quirky but rooted in utility. At the North Pole, it’s all ocean, visited only rarely by an occasional research vessel or a lonely supply ship that strayed from the Northwest Passage. What we think of as a single day, flanked by sunrise and sunset, happens just once per year around the North Pole. So I can’t help but wonder: Does a single day up North last for months?